package com.haixiaoke.saas.system.controller.common;

import cn.hutool.core.date.DateUtil;
import cn.hutool.core.lang.Validator;
import com.google.code.kaptcha.Producer;
import com.haixiaoke.saas.common.config.SaasConfig;
import com.haixiaoke.saas.common.config.sms.SmsConfig;
import com.haixiaoke.saas.common.constant.CacheConstants;
import com.haixiaoke.saas.common.constant.Constants;
import com.haixiaoke.saas.common.core.domain.AjaxResult;
import com.haixiaoke.saas.common.core.redis.RedisCache;
import com.haixiaoke.saas.common.utils.sign.Base64;
import com.haixiaoke.saas.common.utils.sms.SmsUtils;
import com.haixiaoke.saas.common.utils.uuid.IdUtils;
import com.haixiaoke.saas.system.domain.LoginBody;
import com.haixiaoke.saas.system.framework.web.service.SysLoginService;
import com.haixiaoke.saas.system.service.ISysConfigService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.FastByteArrayOutputStream;
import org.springframework.web.bind.annotation.*;

import javax.annotation.Resource;
import javax.imageio.ImageIO;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
 * 验证码操作处理
 *
 * @author haixiaoke
 */
@RestController
public class CaptchaController {
    @Resource(name = "captchaProducer")
    private Producer captchaProducer;

    @Resource(name = "captchaProducerMath")
    private Producer captchaProducerMath;

    @Autowired
    private RedisCache redisCache;

    @Autowired
    private ISysConfigService configService;

    @Autowired
    private SmsUtils smsUtils;

    @Autowired
    private SmsConfig smsConfig;

    @Autowired
    private SysLoginService loginService;

    /**
     * 生成验证码
     */
    @GetMapping("/captchaImage")
    public AjaxResult getCode(HttpServletResponse response) throws IOException {
        AjaxResult ajax = AjaxResult.success();
        boolean captchaEnabled = configService.selectCaptchaEnabled();
        ajax.put("captchaEnabled", captchaEnabled);
        if (!captchaEnabled) {
            return ajax;
        }

        // 保存验证码信息
        String uuid = IdUtils.simpleUUID();
        String verifyKey = CacheConstants.CAPTCHA_CODE_KEY + uuid;

        String capStr = null, code = null;
        BufferedImage image = null;

        // 生成验证码
        String captchaType = SaasConfig.getCaptchaType();
        if ("math".equals(captchaType)) {
            String capText = captchaProducerMath.createText();
            capStr = capText.substring(0, capText.lastIndexOf("@"));
            code = capText.substring(capText.lastIndexOf("@") + 1);
            image = captchaProducerMath.createImage(capStr);
        } else if ("char".equals(captchaType)) {
            capStr = code = captchaProducer.createText();
            image = captchaProducer.createImage(capStr);
        }

        redisCache.setCacheObject(verifyKey, code, Constants.CAPTCHA_EXPIRATION, TimeUnit.MINUTES);
        // 转换流信息写出
        FastByteArrayOutputStream os = new FastByteArrayOutputStream();
        try {
            ImageIO.write(image, "jpg", os);
        } catch (IOException e) {
            return AjaxResult.error(e.getMessage());
        }

        ajax.put("uuid", uuid);
        ajax.put("img", Base64.encode(os.toByteArray()));
        return ajax;
    }


    /**
     * 手机号获取验证码
     */
    @PostMapping("/mobileCaptcha")
    public AjaxResult mobileCaptcha(@RequestBody LoginBody loginBody) {
        // 校验验证码
        loginService.validateCaptcha(loginBody.getPhonenumber(), loginBody.getCode(), loginBody.getUuid(),true);

        // 校验手机号
        if (!Validator.isMobile(loginBody.getPhonenumber())) {
            return AjaxResult.error("手机号格式不正确");
        }

        String verificationCode = generateNumericVerificationCode(6);
        Boolean smsInspectionData = smsUtils.sendTemplateSmsWithData(loginBody.getPhonenumber(), smsConfig.getLoginTemplateCode(), new String[]{verificationCode});
        if (smsInspectionData) {
            redisCache.setCacheObject( CacheConstants.SMS_CAPTCHA_KEY + loginBody.getPhonenumber(), verificationCode, 5, TimeUnit.MINUTES);
            return AjaxResult.success();
        }
        return AjaxResult.error("验证码发送失败");

    }


    /**
     * 生成指定长度的数字验证码
     *
     * @param length
     * @return
     */
    public static String generateNumericVerificationCode(int length) {
        StringBuilder verificationCode = new StringBuilder();
        Random random = new Random();

        for (int i = 0; i < length; i++) {
            int digit = random.nextInt(10); // 生成0到9之间的随机整数
            verificationCode.append(digit);
        }

        return verificationCode.toString();
    }

}
